There are some right insights into human psychology here which are found in many other books about "right relationships". If you are a self-centered individual then this book can be very useful if you would like to become more selfish. Since self-centeredness is the opposite of love you will greatly reduce your opportunities of experiencing real love and truly be satisfied and happy in life.
From a historical standpoint, wonderful book. I have a lot of information on how to be coy and those who 'perfected' the methods. Not sure that I feel as 'powerful' as I'd like, but gained a great foundation.